/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.ibatis2.sqlmap.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.ibatis2.Ibatis2FormattingUtilities;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class UpdateByPrimaryKeySelectiveElementGenerator extends AbstractXmlElementGenerator {

  public UpdateByPrimaryKeySelectiveElementGenerator() {
    super();
  }

  @Override
  public void addElements(XmlElement parentElement) {
    XmlElement answer = new XmlElement("update"); //$NON-NLS-1$

    answer.addAttribute(new Attribute("id", introspectedTable.getUpdateByPrimaryKeySelectiveStatementId())); //$NON-NLS-1$

    String parameterType;

    if (introspectedTable.getRules().generateRecordWithBLOBsClass()) {
      parameterType = introspectedTable.getRecordWithBLOBsType();
    } else {
      parameterType = introspectedTable.getBaseRecordType();
    }

    answer.addAttribute(new Attribute("parameterClass", //$NON-NLS-1$
        parameterType));

    context.getCommentGenerator().addComment(answer);

    StringBuilder sb = new StringBuilder();

    sb.append("update "); //$NON-NLS-1$
    sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
    answer.addElement(new TextElement(sb.toString()));

    XmlElement dynamicElement = new XmlElement("dynamic"); //$NON-NLS-1$
    dynamicElement.addAttribute(new Attribute("prepend", "set")); //$NON-NLS-1$ //$NON-NLS-2$
    answer.addElement(dynamicElement);

    for (IntrospectedColumn introspectedColumn : introspectedTable.getNonPrimaryKeyColumns()) {
      XmlElement isNotNullElement = new XmlElement("isNotNull"); //$NON-NLS-1$
      isNotNullElement.addAttribute(new Attribute("prepend", ",")); //$NON-NLS-1$ //$NON-NLS-2$
      isNotNullElement.addAttribute(new Attribute("property", introspectedColumn.getJavaProperty())); //$NON-NLS-1$
      dynamicElement.addElement(isNotNullElement);

      sb.setLength(0);
      sb.append(Ibatis2FormattingUtilities.getEscapedColumnName(introspectedColumn));
      sb.append(" = "); //$NON-NLS-1$
      sb.append(Ibatis2FormattingUtilities.getParameterClause(introspectedColumn));

      isNotNullElement.addElement(new TextElement(sb.toString()));
    }

    boolean and = false;
    for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
      sb.setLength(0);
      if (and) {
        sb.append("  and "); //$NON-NLS-1$
      } else {
        sb.append("where "); //$NON-NLS-1$
        and = true;
      }

      sb.append(Ibatis2FormattingUtilities.getEscapedColumnName(introspectedColumn));
      sb.append(" = "); //$NON-NLS-1$
      sb.append(Ibatis2FormattingUtilities.getParameterClause(introspectedColumn));
      answer.addElement(new TextElement(sb.toString()));
    }

    if (context.getPlugins().sqlMapUpdateByPrimaryKeySelectiveElementGenerated(answer, introspectedTable)) {
      parentElement.addElement(answer);
    }
  }
}
